Tire Ruler235/75R15 dimensions
| Overall diameter (height) | 28.88″ · 733 mm |
| Section width | 9.25″ · 235 mm |
| Sidewall height | 6.94″ · 176 mm |
| Wheel diameter | 15″ |
| Rim width (rule of thumb) | 6.5–8″ |
| Circumference | 90.7″ |
| Revolutions per mile | 698 |
| In inches (flotation style) | 28.9 × 9.3R15 |
How it’s calculated: the sidewall is 75% of the 235 mm width = 176.3 mm (6.94″). Add two sidewalls to the 15″ wheel: 15 + 2 × 6.94 = 28.88″.
Bigger tires than 235/75R15 on 15″ wheels
| Size | Height | Taller by | 60 mph reads |
|---|---|---|---|
| 30x9.50R15 | 30.0″ | +1.12″ (+3.9%) | 62.3 mph |
“60 mph reads” is your real speed when a speedometer set up for 235/75R15 shows 60. Above about 3% taller, most trucks need a leveling kit or lift, and the speedometer should be recalibrated.
Same height on a different wheel size
Changing wheel size (plus or minus sizing) while keeping the overall height keeps your speedometer right:
- 225/75R16: 29.3″ tall on a 16″ wheel (+1.4%)
- 235/70R16: 29.0″ tall on a 16″ wheel (+0.3%)
- 235/65R17: 29.0″ tall on a 17″ wheel (+0.5%)
- 225/65R17: 28.5″ tall on a 17″ wheel (−1.3%)
- 235/60R18: 29.1″ tall on an 18″ wheel (+0.8%)
- 225/60R18: 28.6″ tall on an 18″ wheel (−0.9%)
- 255/55R18: 29.0″ tall on an 18″ wheel (+0.6%)
- 235/55R19: 29.2″ tall on a 19″ wheel (+1.0%)
- 255/50R19: 29.0″ tall on a 19″ wheel (+0.6%)
- 255/45R20: 29.0″ tall on a 20″ wheel (+0.5%)
- 245/45R20: 28.7″ tall on a 20″ wheel (−0.7%)
- 275/40R20: 28.7″ tall on a 20″ wheel (−0.7%)
Popular 235/75R15 comparisons
Frequently asked questions
Is 235/75R15 a 29 inch tire?
Yes. 235/75R15 is 28.88 inches tall, so it's sold and talked about as a 29-inch tire.
What size is 235/75R15 in inches?
235/75R15 is 28.9 inches tall (overall diameter), 9.3 inches wide, with a 6.9 inch sidewall, and fits a 15 inch wheel.
What tire size is equivalent to 235/75R15?
No common size on a 15" wheel is within 1.5% of 235/75R15's diameter. Use the calculator above to compare any size.
What rim width fits 235/75R15?
As a rule of thumb, about 6.5–8 inches. The tire maker's spec sheet lists the approved range for each model.
How many revolutions per mile does 235/75R15 make?
About 698 revolutions per mile in theory (circumference 90.7 in). Real tires turn slightly more because they flatten under load.